FILE – In this Saturday, July 12, 2014 file photo, immigrants run to jump on a train during their journey toward the U.S.-Mexico border, in Ixtepec, Mexico. Many of the immigrants recently flooding the nation’s southern border say they’re fleeing violent gangs in Central America. These gangs were a byproduct of U.S. immigration and Cold War policies, specifically growing from the increase in deportations in the 1990s. With weak dysfunctional governments at home, U.S. street gang culture easily took hold and flourished in these countries. (AP Photo/Eduardo Verdugo)

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